Canon - EF400MM

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Contents

Canon ef lens EF400mm f 4 DO IS USM Diffractive Optics IMAGE STABILIZER JS ULTRASONIC ENG Instruction Thank you for purchasing a Canon product The Canon EF400mm f 4 DO IS USM lens is a high performance super telephoto lens dedicated to Canon EOS cameras Besides having an Image Stabilizer it is the world s first camera lens incorporating a multi layer diffractive optical element DO The multi layer diffractive optical element is a revolutionary element having the characteristics of both fluorite and aspherical elements It greatly contributes to the lens compactness light weight and high image quality DO stands for Diffractive Optics IS stands for Image Stabilizer USM stands for Ultrasonic Motor Conventions used in ...